Lubricating mechanism for pins.



` A'. WINTON.' .Luplcmnc MEcHAmsM Fon PINS. Avfnricnmu man uc.23, 19m.

1,280,117; Pavmndsepn 24,1918.

y anne-nto@ witness UnrrED sTATEs PATENT oEErcE.)

ALEXANDER Winnen, or' LAxEwodn, omo.

LUBRIGATING MECHANISM Fon EINS.

specification of Letters Patent."

Patented 'Sept'.4 24, 1918.

Application mea December 23, 191s. semina. 138,656.

I. tnres for pins and partiiullarly to such struc tures-for use on or with wrist pins of inotors.

Hcretofore pins and particularly Wrist pins have been made holiow and oil is snpplied to or allowed to accumulate in the opening in the pin and then .be fed to sonic of the bearings of the pin through oil openings in the pin, but in the use of pins of this type time is required to fill 'the opening and damage may result before the opening in the pin is .filled to the point of lubricating the bearings.

This difficulty has led to the present in vcntion wherein the pin is supplied with an internal sleeve of less outside diameter than the bore of the pin throughout most of its length but enlarged at the ends to fit the bore` and thereby providing an annular oil space of sui-all capacity and inclosed so that it fills readily and conveys the lubricant to the pin bea rings through openings provided therein.

The invention niay be further briefly sumn'rarized as consisting in the construction and combination of parts hereinafter de` scribed in the following description, drawings and claims. l

Referring to' Ithel drawings Figure 1 is a sectional view of a portion of a cylinder and 'piston with a part of the connecting rod and provided with any pin' lubricating structure; Fig. 2 is a view partly in elevation v and partly in section showing the pin alone; and Fig. 3 is a sectional view oi the pin.

In A'the arrangement shown 1 represents the cylinderV which is provided with the usual. trunk or other piston :2. This piston is provided with the customary wrist pin hearings 3 bored to receive the wrist pin l which is preferably hollow, open ended and provided with a central oil opening 5 at the bottom and two oil ports or openings 6 at tlietop and within the bearing area of the bearings 3. A So far theI description has been' crmiiued to one type of pin to which my invention is applicable and all. of which' 1is old in the art and my description from now' on 'will be confined to the improvement which constitutes myl invention.

The i'nner edges of thewall of the pin at the opening and at the ends is beveled or rounded at 7 for a purpose which willv4 appear. Within the opening ofthe pin and spaced from the inner wall thereof is a sleeve 8 having enlarged end portions 9 fitf ting the bore of the pin and end fiangcs 1.0

formed or otherwise made to conform to the beveled or rounded edges 7. lt is obvioini that the enlargements 9 serve to holdthe sleeve in proper relation to the pin and that the flanges hold the sleeve in place in the` opening of the pin.

In operation this oil is forced into one of the openings, as 5 for instance, until the annular chamber around the sleeve is filled when the oil will pass out the other open ings, as 6 for instance, to the bearings.

Having described my invention, I 'claim l. A lubricating structure orhollow pins having lateral. oil supply and discharge openings, comprising means providing an annular reservoir within the innerwall. of said pin and eonm'lunicating with the supa ply and discharge openings in the pin.

2. Alubricating structure for hollow pins having lateral. oil supply and discharge openings, comprising a sleeve within the opening in the pin and .forming an annular oil chamber within the pin, said pin and sleeve being provided with means for holding the sleeve within the pin.

A. lubricating structure for hollow pins having lateral oil supply and discharge openings, comprising a sleeve of less diameter than the bore oi the 'plan thereby .form` fing an annular oil chamber with the pin and having enlarged end portions engaging the inner wall rof the pin.

4l. A lubricating structure `for hollow pins having lateral oil supply and discharge openings, a sleeve 'of'less diameter than the bore of the pin thereby forming an anniv lar oil chamber with the pin and having enlarg-ed end portions engaging the inner wall of the pin, and flanges Aat the ends of the sleeve and engaging the ends of the pin for holding the parts in their proper relation. In testimony vwhereof I affix my signature.

ALEXANDER 'WINTon los i los 

